Immunoglobulin M (IgM), Individual Quant
Label Mnemonic: IGM
Epic Lab Code: LAB72
Downtime Form: A-1a General Laboratory Requisition
Chemistry
6240 RCP
356-3527
Specimen(s):
Plasma
Collection Medium:
Plasma Separator Tube 4.5 mL
Alternate Collection Media:
Call laboratory for additional acceptable specimen collection containers.
Minimum:
3 mL whole blood from light green top tube or ONE Microtainer®.
Rejection Criteria:
Specimens received in Sodium Citrate tubes
Testing Schedule:
24 hrs/day, 7 days a week, including holidays.
Turn Around Time:
1 hour (upon receipt in laboratory)
Reference Range:
 0 - 1 yrs 0 - 145 mg/dL 1 - 3 yrs 19 - 146 mg/dL 4 - 6 yrs 24 - 210 mg/dL 7 - 9 yrs 31 - 208 mg/dL 1O - 11 yrs 31 - 179 mg/dL 12 - 13 yrs 35 - 239 mg/dL 14 - 15 yrs 15 - 188 mg/dL 16 - 19 yrs 23 - 259 mg/dL > 19 yrs 40 - 230 mg/dL
Test Limitations:
Criterion: Recovery within plus or minus 10% of initial values. Icterus: No significant interference up to an I index of 60 (approximate conjugated and unconjugated bilirubin concentration: 60 mg/dL). Hemolysis: No significant interference up to an H index of 1000. (approximate hemoglobin concentration: 1000 mg/dL) Lipemia (Intralipid): No significant interference up to an L index of 1700. There is poor correlation between turbidity and triglycerides concentration. There is no cross-reaction between IgM and IgA or IgG under assay conditions. Sera with ill-defined characteristics should be subject to protein electrophoresis to identify a possible antigen excess (e.g. gammopathy). A high dose hook effect may occur at IgM concentrations of greater than 3,000 mg/dL (30 g/L).
Methodology:
Immunoturbidimetric
CPT Code:
82784